Abstract: A cosmetic product and the like, including a deodorant, comprising a dicarboxylic acid and sodium bicarbonate preferably dihydroxybutanedioic acid and sodium bicarbonate and most preferably comprising cream of tarter and sodium bicarbonate. A mixture of sodium bicarbonate, cream of tarter and water forms a paste which hardens into a solid over a period of a few hours. The mixture provides a solid material which is highly stable. It does not dissolve quickly and does not effervesce, but instead remains essentially stable and retains it's solid form.